ISO 914:1977
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ISO 914:1977
5319

Abstract 

The method is applicable to products having a total nitrogen content equal to or greater than 0.05 % (m/m). The principle consists in the conversion of the nitrogen present in a test portion to ammonia by means of nascent hydrogen. Distillation and absorption of the ammonia in an excess of standard volumetric sulphuric acid solution, and back-titration with a standard volumetric sodium hydroxide solution in the presence of an indicator. - Replaces ISO Recommendation R 914-1968.


General information 

  •  :  Withdrawn
     : 1977-11
  •  : 1
     : 4
  •  : ISO/TC 47 Chemistry
  •  :
    71.060.30 Acids

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